A genus of extinct acanthodian fish from the Paleozoic era, about two inches long, with twin spines along its body.
From Greek di- (two) + akantha (spine) + -us (genus suffix). Named by paleontologists in the 19th century for its characteristic paired dorsal spines.
Diplacanthus swam in ancient seas 300 million years ago as a tiny spiky fish—and despite being absolutely tiny, it has one of the coolest scientific names describing its appearance!
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